function showUrl(value) {
	return "http://" + value + "";
}
Ext.onReady(function() {
			var data = [[1, 'EasyJWeb', 'EasyJF', 'www.easyjf.com'],
					[2, 'jfox', 'huihoo', 'www.huihoo.org'],
					[3, 'jdon', 'jdon', 'www.jdon.com'],
					[4, 'springside', 'springside', 'www.springside.org.cn']];
			var store = new Ext.data.SimpleStore({
						data : data,
						fields : ["id", "name", "organization", "homepage"]
					});
			var colM = new Ext.grid.ColumnModel([{
						header : "项目名称",
						dataIndex : "name",
						sortable : true
					}, {
						header : "开发团队",
						dataIndex : "organization",
						sortable : true
					}, {
						header : "网址",
						dataIndex : "homepage",
						renderer : showUrl
					}]);
			var grid = new Ext.grid.GridPanel({
						renderTo : "hello",
						title : "中国Java开源产品及团队",
						height : 200,
						width : 600,
						cm : colM,
						store : store,
						autoExpandColumn : 2
					});
		});